Description du sujet de thèse

During this PhD, the candidate will develop theoretical and numerical tools to study acoustic wave propagation in the presence of active scatterers and nonlinearities. The work will focus on modeling the complex interactions between sound waves and active elements, in various configurations ranging from discrete media to continuous structures. Advanced simulation methods will be employed to analyze nonlinear effects, non-reciprocal phenomena, and non-Hermitian spectral properties.

Contexte de travail

The PhD will be hosted by Laboratorie d'Acoustique de l'Université du
Mans (LAUM), a joint research unit between the Le Mans Université and CNRS, UMR 6613 (section 9, Institut des sciences de l'ingénierie et des systèmes, INSIS). LAUM has about 160 employees including 60 full-time researchers and professors-researchers. It is a leading institution in Acoustics, with a unique ensemble of equipment for general acoustics. It is associated with CNRS, the National Centre for Scientific Research (CNRS) in France.
The PhD candidate will join the “Waveguides and Structures” team at LAUM (Le Mans Université). The team's research focuses on wave phenomena in waveguides, covering topics such as metamaterials, aeroacoustics, nonlinear waves, disorder, symmetries, and topological effects. The candidate will work under the supervision of Dr. Vassos Achilleos and collaborate closely with other team members in the framework of a NASA-funded project.
This PhD will contribute to one of the main objectives of the project: the development of a new experimental approach for visualizing the spatio-temporal evolution of audible sound waves. While such techniques are well established in the field of elastic waves, they remain an open challenge for audible acoustics. This work could thus reveal the full potential of audible acoustics as an experimental platform for studying phenomena inspired by non-Hermitian physics. Targeted phenomena include unidirectional propagation in circular ducts and the implementation of broadband acoustic circulators.

Le poste se situe dans un secteur relevant de la protection du potentiel scientifique et technique (PPST), et nécessite donc, conformément à la réglementation, que votre arrivée soit autorisée par l'autorité compétente du MESR.

Contraintes et risques

Travels within France and abroad should be expected for conferences, summer school
and/or collaborations. Travels will be funded by the project.

Informations complémentaires

Skills:
• Holding a Masters degree in Physics, Acoustics or equivalent
• Experience with basic experimental techniques in acoustics, and well appreciated if
there is experience with laser vibrometers
•Experience in working with scientific software and performing numerical simulations
• Language skills: Fluent English both written and spoken are required.
•. Perform research in a structured and scientifically sound manner.
• Read technical papers, understand different theories and implement
methodologies.
• Aptitude for working in a team on multi-disciplinary projects
• Ability to work while respecting rules and procedures.
• Ability to work independently, organisational ability and ability to account for one's
own actions.
Previous experience in wave propagation and metamaterials is preamble. Knowledge of scientific computational software as Matlab and Comsol is expected.